双分散高分子薄膜中短链对长链缠结和动力学的影响
发布时间：2018-09-04 08:42
【摘要】：采用Monte Carlo微观模拟结合原始路径分析的方法,研究了分子量双分散的高分子薄膜中短链的质量分数对长链的缠结和动力学行为的影响.模拟发现,当短链的质量分数较大时,薄膜内缠结点之间的关联性较低,缠结点易于被解开,长链动力学受到链受限程度的控制,随着膜厚的减小单调减慢;当短链的质量分数较小时,薄膜内缠结点之间的关联性较高,缠结点不易被解开,缠结点数目和关联性共同导致长链动力学随膜厚的非单调变化.模拟结果为明晰分子量分布对高分子薄膜中链缠结和动力学行为的影响规律提供了有益参考.
[Abstract]:The effects of the mass fraction of short chains on the entanglement and kinetic behavior of long chains were studied by means of Monte Carlo microsimulation and original path analysis. The simulation results show that when the mass fraction of the short chain is high, the correlation between the entanglement points in the film is low, the entanglement point is easy to be untied, and the long chain dynamics is controlled by the chain restriction degree, and decreases monotonously with the decrease of the film thickness. When the mass fraction of the short chain is small, the correlation between the entanglement points in the film is higher, and the entanglement point is difficult to be solved. The number of entanglement points and the correlation result in the non-monotone variation of the long chain dynamics with the film thickness. The simulation results provide a useful reference for clarifying the influence of molecular weight distribution on chain entanglement and kinetic behavior in polymer films.
【作者单位】： 吉林大学材料科学与工程学院教育部汽车材料重点实验室;中国人民武装警察部队学院消防指挥系;中国科学院长春应用化学研究所高分子物理与化学国家重点实验室;
【分类号】：O631
本文编号：2221579
[Abstract]:The effects of the mass fraction of short chains on the entanglement and kinetic behavior of long chains were studied by means of Monte Carlo microsimulation and original path analysis. The simulation results show that when the mass fraction of the short chain is high, the correlation between the entanglement points in the film is low, the entanglement point is easy to be untied, and the long chain dynamics is controlled by the chain restriction degree, and decreases monotonously with the decrease of the film thickness. When the mass fraction of the short chain is small, the correlation between the entanglement points in the film is higher, and the entanglement point is difficult to be solved. The number of entanglement points and the correlation result in the non-monotone variation of the long chain dynamics with the film thickness. The simulation results provide a useful reference for clarifying the influence of molecular weight distribution on chain entanglement and kinetic behavior in polymer films.
【作者单位】： 吉林大学材料科学与工程学院教育部汽车材料重点实验室;中国人民武装警察部队学院消防指挥系;中国科学院长春应用化学研究所高分子物理与化学国家重点实验室;
【分类号】：O631
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